Speed-changing transmission-gearing.



C. L. HOWARD.

SPEED CHANGING TRANSMISSION GEARING.

APPLICATON FILED APR. 22. I913.

Patented Oct. 19, 1915.

2 SHEETS-SHEET 1- C. L. HOWARD.

SPEED CHANGING TRANSMISSION GEARING.

Patented Oct. 19, 1915.

2 SHEETS-SHEET 2.

. ahvmdoz Gum/nu,

UNITED FHCE Y oneness L HQWARD, orf'onrfav, canrronivrn,

. srnnn-orienerna 'rRANs IssI-on-snl arne.

To. all whom ii/may, concern: v -Be-it known that I, CHARLES L. HowA p,

a itizen of the United States, residing at 7 cycles.

The general ob purposes for which speed changing gearing is used butparticularly for use in jmotor- A special object of the invention is. topro i -ide a, compact construction of 7 simple parts in motorcycle speedchanging transmission gearing operable to. change, from a; state of restto,.either a high or low speed by the manipulation of a single lever,

With these objects in view the, invention consists. in the improvedconstruction, ar-

rangement and combination of parts of a transmission gearing of .thetype specified,

' which will be fully described hereinafter and afterward specificallyclaimed. 3' I In order that its constructionandoperation maybe readilycomprehended, I have ill str t d nthe. accompany ng rawss.

approved embodiment of my invention in;

which drawings.

Figure l representsa sectional view on a central longitudinal planecutting through. ithe complete mechanism, parts being shown 'inelevation and parts broken away. "Fig." 2 represents a sectional viewon. a trans:

verse plane indicated by the broken line 2+2 inFig. 1, looking to theright, as indicated by the arrows. "Fig. 3 represents a like sectionalview on the plane indicated by the broken .line 33 in Fig. 1, looking tothe left, as indicated by the arrows. Fig. 4 represents a like sectionalview on the plane indicated by the broken line M of Fig. 1,

looking to the right, as indicated by the.

arrows.

Like reference characters mark the sameparts in all of the figures ofthedrawings. Referring specifically to the drawings,the

driving element is 'a central shaft 8, while 1 the driven element is inthe form of'a pulley 9 (or a chain sprocket gear) which forms ect, ofthe invention is to,

Specification of Letters 2ate1it: l v Patented'och 1,9 1915 Applicationfilgd aprnez, 1913. seria nazazea, 1

also apart of the. casing 10, for the parts of the changeable speedtransmission mechanism. The second part or cover 11 of the casing 10 isremovably secured to the. first part. and locked thereon by the ring 12.

' A sleeve 13, is disposedin absolute alinement with thel drive shaft 8and carries 3 arm; 1i rigidly secured. thereto undera nut:

The arm 141s adaptedto, be anchored to a suitable support or frame(.not' shown),

so, as to lock the sleevel3,againstxrotation.

pulley 9., a

The. end oftheldrix're, 8. is tapered.

' Bearing balls 16. are! disposed between a flanged? on the sleeve 13"and the cover 11, which latter is apertured to receive said sleeve; A''shell" 18 'is rotatably mounted within, the casing 10- and is supportedby" 1;.

bearing balls 16, disposed between; the inner corner and thjelfiange17,andalso between. opposite .outer cofrner of said sleeve; andthe outercornerofthe casing LO, carrying the andkeyed to the centra l pinion 20having a 3 laterally projectingflange 21 Bearing balls 22; are disposedbetween the body of the pul,

a 9 and he u of th entr l; pinion 20,

an d. areheld inoperative, position by a. con e- ,Intermediate o1;-planetary pinionSlZh vmeshing "with the pinionj20, are mounted onthestubsends of threadedshanks 25 secured e Pu le he lane ary P 0 $2 Falso mesh with 'the'teeth26 on the interior" otthelargeopeuend0ttheshe11.l.8-;- The; clutch mechanism comprises a. double set offriction disks 27 and 28, mountedto rotate with the shell 18, andcomplementary setsofdisks 29 and 30, mounted to "rotate with the centralpinion 20 and sleeve 13, respectively. An abutment disk 31 is looselyinoun ted-between the sets 27 and 29,-and 28 and 30 of friction-disksand rotatably mount ed upon the shank ofabolt 32 and between i i l thehead of the latter and a ring of bearing balls 33. p r

The bolt '32 'is threaded in the end of a screw shaft 34, adaptedfor-rotary and longitudinal movement through the threaded.

' bore of the sleeve 13. The outer'end of the screw shaft 34 isreducedand the shoulder thereon radially corrugated .to cooperate withthe corrugations on the innerface of the ring 35 carried by theoperating lever 36, both of the latter parts being-preventedfromdisengagement with the reduced end by a nut 37. The lever 36 isloosely mounted upon the reduced end of the screw shaft is transmitted34, while the ring 35 is yieldably attached to the operating lever 36 bythe leaf spring 38, anchored at one end between the jaws 39 of said ringand at the opposite end in a split lug 40, carried by said lever. Thering 35 yieldably operates the screw shaft 34 from the operating lever36 and prevents injury to the mechanism by abrupt or violent shifting ofthe operating lever.

A removable screw plug 4-1 is positioned through the casinglO at aconvenient point to permit the interior mechanism to be oiled at suchtimes as desired.

The operation of the device is as follows: When the parts are in. theposition shown in Fig. 1, the abutment disk 31 is in its neutralposition, and rotation of the drive shaft 8 to the rotatable shell 18through the planetary gear pinions 2%, while the pulley 9, casing 10 andcover 11 remain stationary. In order to lock the drive shaft 8 with thepulley 9, to rotate the letter. at

' high speed, the operating lever 36'is shifted in the proper directionto move the screw shaftB-ft together with the abutment disk 31 inwardly,and thus lock the shell 18 with central gear 20 by means of thefrictionally locked disks :27 and 29. In order to rotate the pulley 9 atless speed than the drive shaft 8, the operating lever 36 is shifted inthe opposite direction to move the abutment disk 31 against the set offriction disks 28 and and thus lock the shell 18 stationary with respectto the slceve13. The pulley 9 is consequently rotated with the centralgear pinion 20 of the drive shaftS by the planetary gearpinionsQa, butat less speed.

What I claim is 1. The combination with a driving element, of a drivenelement carrylng a casing,

a central pinion keyed to the end of said driving element, planetarypinions carried by said driven element, a shell rotatable in said casingand having teeth meshing with said planetary pinions, means for lockingI said shell with said central pinion, and for locking said shellstationary.

with said central pinion. and the teeth on said shell, a sleeverotatable in the cover of said casing, a stationary support andclutching means operated thereby for look ing said shell'with eithersaid driving element or said stationary support.

In combination a shaft, a pulley having a drum surrounding said shaft, asleeve fixed in position in alinement with said shaft, a shellsurrounded by said drum and mounted loosely on said sleeve, meansactuated by the shaft to rotate the shell, a member arranged toreciprocate between the inner end of the shaft and the sleeve, and meanscooperating with said first named means and engaged by saidreciprocating '7 member in one direction to cause said pulley to rotateat high speed and inthe opposite direction to cause the rotation of thepulley at low speed.

In testimony whereof, I aiiiX my signature in presence of two Witnesses.

CHARLES L. HOWARD.

Witnesses:

A. A. COLLINS.

EV. J. BUTLER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

7 Washington, D. G.

